Never have to search for the missing stacker pieces again! A fantastic row of 10 boxes completely joined, which roll up into (and out of) each other. The boxes are labelled with numbers 1-9 and the flip side of the box depicts an animal. The Pop Box promotes dexterity and coordination while the colour and numbers teach the basics. Just hold the end and roll it out like letting go of a bowling ball. Made of sturdy laminated card. Age guide: from 12 months - 4 years.á